TY JOUR TI EXPERIMENTAL AND ANALYTICAL DETERMINATION OF CRITICAL TEMPERATURE POINTS OF THE GREENHOUSE KW greenhouse thermodynamics KW automatic greenhouse control KW maximum temperature KW heat reversal KW system of equations KW quadratic equation KW cubic equation. JO Vestnik of Kazan State Agrarian University AU Smirnov, P.A. AU Tikhonova, A.V. PY 2023 IS 17 PB Kazan state agrarian University